Pipe-engaging slip



Nov. 13, 1928.

C. R. EDWARDS ET AL PIPE ENGAGING SLIP Filed May '7 1921 ATTORNEYS.

Patented Nov. 13, 1928.

UNITED STATES CHAR-LES n. EDWARDS AND sn rrr EVANS, or nous'ronrnxns.

PIPE-ENGAGING SLIP.

Application filed May 7,

This invention relates to new and useful improvements in pipe engagin slips.

One object of the invention is to provide a device of the character described which is 1 specti've ends ot the cable SQ-LtlOIlS 4 and 5 are specially adapted for use in rotary drilling and is designed be nserted in the rotary for the purpose of enga ing with and holding the pipe, or drill stem, while the same is being withdrawn from the bore in the process of breaking up or being let down into the bore in the process of making up the drill stein.

Another object is to provide pipe engaging slips formed of two sections, each section being independent of the other and ea' h being formed of two jaws which are secured together and which are movable so that in use the jaws will adapt themselves to the shape of irregular pipe and will thus more nearly grip the pipe all the way round and thereby more securely hold the same against slipping and dropping into the bore.

Another advantage of the slip herein described consists in the fact. that the jaws of each section being secured together cannot drop into the bore.

Another feature resides in the provision of a slip which is of very simple construction and which consequently may be cheaply and easily manufactured and readily handled in the process of drilling.

With the above and other objects in view the invention has particular relation to certain novel features-of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, where- Figure 1 is a plan view of the slip.

Figure 2 is a side view, and

Figure 3 is a fragmentary transverse sec tional view taken on the line 33 of Figure 1.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numerals 1, 1 designate the aws of one section of the slip and the numerals 2, 2 designate the jaws of the other section. These jaws are wedge-shaped, that is, they taper downwardly and they are arcuate in form and their inner sides are transversely corrugated forming the pipe engaging teeth 3. The jaws of each section may vary in number and usually they are fastened together by the respective bails or of independent sections, each section being handles 4 and 5. These handles are prefer- 1921. Serial'No. 467 690.

ably formed of short sections of cable, and" fitted over them are 'the tubular grips 6 and 7 but any desired type-of handle or holder suitable for the purpose maybe used. The refitted into deep sockets in the upper sides of the respective jaws and are preferably secured therein by babbitt'8' and 9. Provision is thus made for lifting the slip sections into or out of position around the pipe. The jaws 1 may have the aligned holes or recesses 10, 10 and likewise the jaws 2 may have similar aligned holes or recesses 11, 11., and in these the corresponding ends of the bearing rods 12 and 13 are fitted loosely so as to permit the jaws to freely slide toward each other on said bearing rods, thus giving them free play to conform themselves to and fit around pipe whether the same be perfectly round or irregular contour.

WVhat we claim is 1. A pipe engaging slip, whose outer periphery converges downwardly formed of two sections, each section being formed of jaws whose sides have aligned bores, and bearing rods whereon each of the aws of the respective sections are slidably mounted, the respective ends of said rods fitting into the corresponding bores, and means retaining the jaws of each section together as aunit, said retaining means also forming a handle.

2. A pipe engaging slip formed of a plurality of sections, eachsection being formed of jaws whose facing sides have aligned bores, bearing rods whose respective ends are fitted loosely into the corresponding bores, and a bail connecting the aws of the respective sections. r v

3. A pipe engaging slip formed of a plurality of. independent sections, each section being formed of jaws, each jaw being arcuate and tapering downwardly, the facing sides of the jaws of the respective sections having aligned bores, bearing rods whose'respective ends are fitted loosely in the corresponding bores, and a bail connecting thejaws of the respective sections. Y

4. A pipeengaging slip for rotaries formed of independent sections each section being formed of jaws, the contiguous sides of adjacent jaws having aligned holes, a common retaining member whose endsfit loosely into the corresponding holes. i

5. A pipe engaging slip for rotaries formed Inn -jformed of avvs, ,t-he contiguous sides of adjacent jawshaving aligned holes; a common retaining member Whose ends fitiintonthe corresponding holes and are slidahletherein, and means "holding said jaws together as "a unit, and-a handle for said section, pipe engaging slip composed of a plurality of sections, each section being composed of a plurality of pipe engagingvjaws, said jawsnhaving transverse openings intermediate their ends, a rod fitted slidably in each of said openings, means to retain said jaws on said ro'd,said retaining means also forming means to move each section as a unit v l 7. A rotary pipe holding slip adaptedto fit into adoW'nWardly converging seat and Lara;

consisting of, a plurality ofsectioi'ls each sec tion consistingof a plurality of pipe engagingjaWs, the lateral contiguous faces of the aws each having a recesstormed therein and the outer side of each 'j'aw tapering down-- nvv ardly and inwardly, so as to conform in taper to the taper of said opening, teeth on th e inner faees of said jaws adaptedtor 

